Muffler cut-out.



0. H. WATKINS.

MUFFLER CUT-OUT.

APPLICATION FILED JULY H. 1917.

1,242,621. V Patented Oct. 9,1917;

// Gm /5 4 flllllllllllua] OBLA HUNT WATKINS, OF MARSHALLTOWN, IOWA.

MUFFLER cur-our.

Specification of Letters Patent.

Patented. Oct. 9, 1917.

Application filed July 11, 1917. Serial No. 179,786,

To all whom it may concern:

Be it known that I, ORLA H. WATKINS, a citizen of the United States, and a resident of Marshalltown, in the county of Marshall and State of Iowa, have invented a new and Improved Mufiier Cut-Out, of which the following is a full, clear, and exact description.

This invention relates to a muffler cut-out adapted for use in connection with automobiles and has for its general objects to improve and simplify the construction and operation of devices of this character so as to be reliable and eflicient in use, comparatively simple and inexpensive to manufacture and so designed that the operating means for the cut-out can be materially simplified. Y

A more specific object of the invention is' the provision of a mufiier cut-out having a novel arrangement of valve, bearing means therefor, and spring means for holding the valve normally closed.

With such objects in view, and others which wijl appear as the description proceeds, the invention comprises various novel features of construction and arrangement of parts which will be set forth with particularity in the following description and claims appended hereto.

In the accompanying drawing which 1llustrates one embodiment of the invention and wherein similar characters of reference indicate corresponding parts in all the views,

Figure 1 is a vertical section on the line 1-1, Fig. 2; V

Fig. 2 is a side view of the cut-out,

Fig. 3 isv a vertical section on the line 33, Fig. 1; and

Fig. 4 is a bottom plan view of the cutout.

Referring to the drawing, 1 designates the exhaust pipe of an internal combustion engine, which has an opening 2, at which is fitted a muifler-cut-out A. This comprises a body made in two parts 3 and 4 divisible axially on the lane 5, and the sections 3 and 1 have matlng flanges 6 and 7 through which pass bolts 8 for clamping the sections together around the pipes 1 and 2. The

section 4 is formed with a depending hollow extension 9 which forms the outlet for the exhaust when the muffler is to be cut out.

they are not subject to wear.

nals 11 of the butterfly valve 12. The walls I of the recesses are provided with perfora tions 13 through which extend wires 14 to form keepers for holding the journals in their bearing recesses 10. The valve journals 11 do not bear on the wires, so that The valve is pulled upwardly by helical extension springs 15, the lower ends of which are hooked into apertured. lugs 16 on the journals 11, and the upper ends of the springs are engaged in apertures 17 in the flanges 7 These springs normally hold the butterfly valve in closed position, as shown in Fig. 3, it being understood that the valve is of slightly larger diameter in. a direction at rightangles to the axis than the diameter of the outlet' 9, so that the valve cannot make a complete turn. One of the journals-is extended and has an operating arm 18 connected therewith, which in turn is connected by suitable means with the cut-out pedal of the car. When pressure is applied to the pedal the arm. 18 swings and the valve 12 is opened against the tension of the springs 15, and when the pressure is removed from the pedal the said s rings contract and return the valve to close position.

Another feature in connection with this cut-out which makes it superior to any similar construction is the fact that the butterfly valve having a wide peripheral edge and positive tension from the springs 15 causes the valve to make a ground joint in the outlet and thus insures atight closing cut-out valve.

From the foregoing description taken in connection with the accompanying drawing, the advantages of the construction and.

method of operation will be readily understood by those'skilled in the art to which the invention appertains, and while I have described the principle of operation, together with the device which I now consider to be the best embodiment thereof, I desire to have it understood that the device shown is merely illustrative and that such changes may be made when desired as fall within the scopeof the appended claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent: 4

1. A muflier cut-out comprising a body having an opening the edge of the opening being provided with recesses forming bearings, a butterfly valve in the opening and having journals disposed in the said recesses, and spring means connected with the journals and with the said body for holding the butterfly Valve closed position.

2. A. muflier cut-out comprising a body having an opening, the edge of the opening being provided with recesses forming bearings, a butterfly valve in the opening and having journals disposed in the said recesses, spring means connected with the journals and with the said body for holding the butterfly valve in closed position, and keepers extending across the recesses to retain the journals therein,

3. A muffler cut-out comprising a chambered body having a hollow extension forming anoutlet, the edges of the extension being provided at opposite points with re-= cesses, a butterfly valve disposed in the extension and having journals bearing in the recesses, keepers fastened to the extension and disposed under the journals, lugs on the journals, extension springs connected with the lugs and with the body for holding the butterfly valve yieldingly in closed position, and means connected with one of; the journals for operating the butterfly valveagainst the tension ofthe said springs.

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